To have the greatest impact on the public health, interventions need to reach as large a proportion of the smoking population as possible. A significant science base now exists that demonstrates the effectiveness of tobacco quitlines. While the provision of telephone counseling has improved the reach of treatment services to smokers, research is needed to enhance their utilization or reach. In 2001, ClearWay Minnesota (formerly known as MPAAT [Minnesota Partnership for Action Against Tobacco) funded the QUITPLAN Helpline, a telephone-based tobacco cessation counseling service for Minnesotans. Consistent with findings from other quitlines, the QUITPLAN Helpline has reached only 1.5% of smokers in Minnesota. Nonsmokers have a substantial potential role in tobacco control efforts. They represent 82% of the adult population of Minnesota. A novel approach to increasing smoker utilization of effective cessation services is by focusing on nonsmokers who want to help a smoker, i.e., support persons or proxies. Numerous studies provide evidence for the role of extra-treatment social support in smoking cessation. The current study builds on our previous work which indicated the feasibility and potential efficacy of directly recruiting and providing intervention for support persons. Cohen?s theory of social support and health is the conceptual basis for the proposed intervention.